so_brave 发表于 2012-02-26 23:09

JavaScript计算字符串中每个字符出现的次数

JavaScript计算字符串中每个字符出现的次数




代码如下:function numInstring(str){    str=str.replace(/ /ig,"");    var strArr=str.split("");    var result=[],beforeLength,afterLength,reg;    for(var i=0;i<strArr.length;i++){      if(str.indexOf(strArr)!=-1){            beforeLength=str.length;            reg=new RegExp(strArr,"ig");            str=str.replace(reg,"");            afterLength=str.length;            result.push(strArr+":"+(beforeLength-afterLength));      }    }    return result;}var result=numInstring("This section of the site is dedicated to the JavaScript language itself, the parts that are not specific to Web pages or other host");console.log(result);/*result:["T:17", "h:7", "i:9", "s:10", "e:14", "c:5", "o:8", "n:3", "f:3", "d:3", "a:9", "J:1", "v:1", "r:5", "p:4", "l:2", "g:3", "u:1", ",:1", "W:1", "b:1"]*/
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如果有一天21 发表于 2012-02-26 23:10

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